package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper,Orders> implements OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    private Orders orders;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional//事务注解
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //处理业务异常(地址簿，购物车数据为空)
        //地址簿为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询当前用户购物车数据
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        //购物车为空
        if (shoppingCartList==null||shoppingCartList.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表插入数据
        Orders orders=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        //订单号使用当前时间的时间戳转为字符串的值
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        //收货人
        orders.setConsignee(addressBook.getConsignee());
        //用户id
        orders.setUserId(userId);

        this.orders=orders;

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList =new ArrayList<>();
        //向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList){
            OrderDetail orderDetail=new OrderDetail();//订单明细
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(orders.getId());//设置当前订单明细关联的订单id
            orderDetailList.add(orderDetail);
        }

        //批量插入
        orderDetailMapper.insertBatch(orderDetailList);

        //清空购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
//        User user = userMapper.getById(userId);

        User user=userMapper.selectById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
//        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
//        vo.setPackageStr(jsonObject.getString("package"));
//        return vo;

        //以上是微信支付代码，以下为修改后不用微信支付直接重定向成功代码
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        Integer OrderPaidStatus = Orders.PAID;//支付状态，已支付
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        LocalDateTime check_out_time = LocalDateTime.now();//更新支付时间
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());


        //在用户下单后点击支付就立即提示接单，因为在前面设置支付的时候，默认都是直接支付成功，所以跳过了paySuccess方法
        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map=new HashMap<>();
        map.put("type",1);//1表示来单提醒，2表示客户催单
        map.put("orderId",orders.getId());//订单id
        map.put("content","订单号："+this.orders.getNumber());//订单号


        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
//        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
        QueryWrapper<Orders>wrapper=new QueryWrapper<>();
        wrapper.eq("number",outTradeNo);
        Orders ordersDB = orderMapper.selectOne(wrapper);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

//        orderMapper.update(orders);
        orderMapper.updateById(orders);

//        //在用户下单后点击支付就立即提示接单，因为在前面设置支付的时候，默认都是直接支付成功，所以跳过了paySuccess方法，在payment方法点击支付就自动提示
//        //通过websocket向客户端浏览器推送消息 type orderId content
//        Map map=new HashMap<>();
//        map.put("type",1);//1表示来单提醒，2表示客户催单
//        map.put("orderId",ordersDB.getId());//订单id
//        map.put("content","订单号："+outTradeNo);//订单号
//
//
//        String json = JSON.toJSONString(map);
//        webSocketServer.sendToAllClient(json);
    }


    /**
     * 历史订单查询
     *
     * @param pageNum
     * @param pageSize
     * @param status   订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
     * @return
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page!=null&& page.getTotal()>0){
            for (Orders orders : page) {
                Long orderId = orders.getId();//订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(),list);
    }


    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        // 根据id查询订单
//        Orders orders = orderMapper.getById(id);
        Orders orders = orderMapper.selectById(id);

        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @return
     */
    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(id);
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal(0.01),//退款金额，单位 元
//                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
//        orderMapper.update(orders);
        orderMapper.updateById(orders);

    }

    /**
     * 再来一单
     *
     * @param id
     * @return
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");//id作为属性过滤器，表示只不复制id属性。
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        //分页查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<Orders> ordersList = page.getResult();

        // 循环遍历第二步结果 查询订单明细
        List<OrderVO> orderVOList = new ArrayList<>();

        for (Orders orders : ordersList) {
            //订单明细
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

            // 4.拼接VO
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders,orderVO); // 复制同名属性

            String dishNames=""; // 拼接菜品名字
            for (OrderDetail orderDetail : orderDetailList) {
                dishNames+=orderDetail.getName()+ "*" +orderDetail.getNumber()+";";
            }
            orderVO.setOrderDishes(dishNames);

            orderVOList.add(orderVO);

        }return new PageResult(page.getTotal(),orderVOList);

    }

    /**
     * 各个状态的订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
//        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
//        Long confirmed = orderMapper.countStatus(Orders.CONFIRMED);
//        Long deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 使用MyBatis Plus的count方法进行统计
        QueryWrapper<Orders>wrapper=new QueryWrapper<>();
        wrapper.lambda()
                .eq(Orders::getStatus, Orders.TO_BE_CONFIRMED);
        Long toBeConfirmed =orderMapper.selectCount(wrapper);

        wrapper.lambda()
                .eq(Orders::getStatus, Orders.CONFIRMED);
        Long confirmed =orderMapper.selectCount(wrapper);

        wrapper.lambda()
                .eq(Orders::getStatus, Orders.DELIVERY_IN_PROGRESS);
        Long deliveryInProgress =orderMapper.selectCount(wrapper);


        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     *
     * @return
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

//        orderMapper.update(orders);
        orderMapper.updateById(orders);
    }

    /**
     * 拒单
     *
     * @return
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO)throws Exception {
        //根据id查询订单
//        Orders ordersRJ=orderMapper.getById(ordersRejectionDTO.getId());
        Orders ordersRJ=orderMapper.selectById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersRJ == null || !ordersRJ.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersRJ.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersRJ.getNumber(),
//                    ordersRJ.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款成功");
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersRJ.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setPayStatus(Orders.REFUND);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

//        orderMapper.update(orders);
        orderMapper.updateById(orders);
    }

    /**
     * 取消订单
     *
     * @return
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{
        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        Orders ordersDB = orderMapper.selectById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
            log.info("申请退款成功");
        }

        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
//        orderMapper.update(orders);
        orderMapper.updateById(orders);
    }

    /**
     * 派送订单
     *
     * @return
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(id);
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

//        orderMapper.update(orders);
        orderMapper.updateById(orders);
    }

    /**
     * 完成订单
     *
     * @return
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
//        Orders ordersDB = orderMapper.getById(id);
        Orders ordersDB = orderMapper.selectById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

//        orderMapper.update(orders);
        orderMapper.updateById(orders);
    }

    /**
     * 客户催单
     * @param orderId
     * @return
     */
    @Override
    public void reminder(Long orderId) {
        // 根据id查询订单
//        Orders orders = orderMapper.getById(orderId);
        Orders orders = orderMapper.selectById(orderId);

        // 校验订单是否存在
        if (orders == null ) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map=new HashMap<>();
        map.put("type",2);//1表示来单提醒，2表示客户催单
        map.put("orderId",orderId);
        map.put("content","订单号："+orders.getNumber());

        String json= JSON.toJSONString(map);

        //通过webSocket向客户端推送消息
        webSocketServer.sendToAllClient(json);

    }
}


